奥巴马每周电视讲话:总统呼吁不能对气候变化再掉以轻心

Hi everybody. 大家好! Wednesday is Earth Day, a day to appreciate and protect this precious planet we call home. 下周三是世界地球日,这是我们珍惜和保护这个作为我们共同家园的珍贵星球的日子。 And today, there's no greater threat to our planet than climate change. 当今对这个星球的威胁之中,没有什么比气候变化更严重了。 2014 was the planet's warmest year on record. Fourt...

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